HappyRun G70 Pro is the ultimate electric cargo bike for families. A: Yes, it can reach 36mph, but its speed is affected by the battery level and the weight of the rider, usually reaching 34-36mph. Removeable Rear Seat: The rear seat of this two seater e-bike can be replaced with a cargo rack as an electric cargo bike for groceries.We have set a buckle at thebottom of the rear seat to place the rear rack, so that you can replace the suitable rack by yourself.The rack can bear up to 50Ibs.